refrigerator
The Italian word 'frigorifero' is most commonly used in any context where an English speaker would say 'refrigerator'. Just like in English, 'frigorifero' is used to refer to the large household appliance that people use to store food and drinks at low temperatures.
The milk in the refrigerator is expired.
This sentence is about an observation of a spoiled milk present in the refrigerator and is indicative of situations wherein one has to check the expiration dates of food items in the refrigerator.
Let's put the ice cream in the refrigerator.
This is an imperative sentence giving a suggestion or an order to place a particular food item, in this case ice cream, inside the refrigerator. In English, the 'let's' construction is used to form the first-person plural imperative.
I forgot to close the refrigerator.
This sentence is expressing regret about an oversight. In this case, the speaker has forgotten to close the refrigerator, and is stating this fact in hindsight.